Tesseropora rosea

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Tesseropora rosea
Rose-coloured Barnacle, Shoalhaven - Pt B, New South Wales, Australia imported from iNaturalist photo 112228291.jpg
at Bawley Point, Australia
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Arthropoda
Class: Thecostraca
Subclass: Cirripedia
Order: Balanomorpha
Family: Tetraclitidae
Genus: Tesseropora
Species:
T. rosea
Binomial name
Tesseropora rosea
Krauss 1848
Synonyms [1]
  • Conia roseaKrauss, 1848
  • Tetraclita rosea Darwin, 1854 [2]

Tesseropora rosea, the rose barnacle, is a species of barnacle found in Australia, South Africa, and Indonesia, where they inhabit exposed, wave-broken rocks and littoral areas. They feed primarily on zooplankton and extend their cirri only when the current is strong. Their shells, usually around 2 centimetres (0.79 in) in diameter, are made of four plates and turn pink as they age.

Contents

Description

A cluster of rose barnacles Rose-coloured Barnacle, Royal National Park, NSW 2508, Australia imported from iNaturalist photo 211053629.jpg
A cluster of rose barnacles

Rose barnacles have a steep, conical shell with an outer wall made up of four plates. The calcareous shell base is usually around 1.9 centimetres (0.75 in) in diameter but may exceed 2.5 centimetres (0.98 in); the barnacles typically grow 1.3 centimetres (0.51 in) tall. [3] :366 The central triangle-shaped portions of these plates are called parietes – which in this species have each a single row of large, square pores or tubes. The pores are inside the parietes and can only be seen when the barnacle is dead, detached, and then viewed from below. [1] [3] :353 & 366 The colour of the shell among younger barnacles is pale grey, but the shell pinkens as it ages. [4] The shell is covered with purplish lines. [1] The opened top part of the barnacle shell, which connects to the outside, is called the orifice. It can be closed by the operculum, which comprises two small shells, known as the tergum and the scutum, divided by a small linear opening; this acts as something of a lid for the barnacle. [3] :352–3 The orifice of rose barnacles is usually pentagonal, but is often much eroded, and may appear quadrilateral or triangular. Similarly, the outsides of the barnacles' opercular valves often face erosion. Both valves are thick and solid, and have visible ridges and furrows on them. [3] :366 The size of the orifice ranges from 2.3 to 7.8 mm (0.091 to 0.307 in) across. [1]

Habitat and distribution

The barnacles' habitat is exposed rocky shores, from high tide levels to a depth of 58 metres; the barnacles are able to tolerate strong wave activity. [5] [6] They attach to stones and shells. In Australia, the rose barnacle is common in Sydney Harbour and is abundant on the east coast in New South Wales and Queensland, between the 19th and 38th parallels south, as well as around Lord Howe Island, the isolated Kermadecs. [3] :366 [1] On the continent's west coast, it is found in the Fremantle area and from Albany, where it may have been introduced through ballast water transfer. [7] :665 [8] The species, however, was originally described from South Africa's Algoa Bay. In Indonesia, they are known from the islands of Ambon and Saparua. [1]

Diet

Rose barnacles feed on zooplankton, mostly small crustaceans such as copepods, but also barnacle nauplii, diatoms, and algae. [9] :649 They extend and spread their cirri to feed only during periods of strong current, and thus cannot not live in calm-water areas. [1]

References

  1. 1 2 3 4 5 6 7 Pitriana, Pipit; Valente, Luis; Rintelen, Thomas von; Jones, Diana S.; Prabowo, Romanus E.; Rintelen, Kristina von (2020-07-03). "An annotated checklist and integrative biodiversity discovery of barnacles (Crustacea, Cirripedia) from the Moluccas, East Indonesia". ZooKeys (945): 17–83. doi: 10.3897/zookeys.945.39044 . ISSN   1313-2970. PMC   7351798 . PMID   32714005.
  2. "List of barnacles sent to the Copenhagen Museum". Natural History Museum of Denmark. Edited by John van Wyhe (Darwin Online). Retrieved 3 February 2025.
  3. 1 2 3 4 5 Pope, E. C. (1945-06-25). "A simplified key to the sessile barnacles found on the rocks, boats, wharf piles and other installations in Port Jackson and adjacent waters". Records of the Australian Museum. 21 (6): 351–372. doi:10.3853/j.0067-1975.21.1945.550. ISSN   0067-1975.
  4. "Tesseropora rosea". Museums Victoria Collections. Retrieved 9 August 2019.
  5. "Tesseropora rosea". Atlas of Living Australia. Archived from the original on 9 Aug 2019. Retrieved 9 August 2019.
  6. "Tesseropora rosea". Museum of Tropical Queensland. Archived from the original on 23 Mar 2015. Retrieved 9 August 2019.
  7. Jones, Diana S. (1990). "Occurrence of the Barnacle Tesseropora rosea (Krauss) (Thoracia, Balanomorpha, Tetraclitidae) in Western Australian Waters". Records of the Western Australian Museum. 14 (4). Retrieved 2025-01-03.
  8. Huisman, John M.; Jones, Diana S.; Wells, Fred E.; Burton, Timothy (2008). "Introduced marine biota in Western Australian waters". Records of the Western Australian Museum. 25: 23.
  9. Anderson, D. T.; Buckle, J. (1983-07-01). "Cirral Activity and Feeding in the Coronuloid Barnacles Tesseropora Rosea (Krauss) and Tetraclitella Purpurascens (Wood) (Tetraclitidae)". Bulletin of Marine Science. 33 (3): 645–655.